i'm john delaney, and i approve this message. . >>> three u.s. senators are calling for congressional investigation into the consulate attack in libya. they want to know whether the white house and the state department handled it properly. >> that is after a class by cable showed the state department knew about the security concerns before the attack happened. molly hennenberg has more. >> reporter: this classified cable was sent august 16th to the state department. that was less than one month before the september 11th attack in libya, and it describes how u.s. personnel on the ground were making contingency plans. the cable reads in part, quote, this daily pattern of violence would be the new normal for the foseable future. it went on to say, quote, personnel could co-locate to the annex, talking about the cia annex. if the security environment downgraded suddenly. it also revealed that they were concerned about the trustworthiness of the libyan militia. the 17 february brigade, which is protecting the consulate. noting that, quote, certain sec